bpf, ppc64: remove obsolete exception handling from div/mod

Since we've changed div/mod exception handling for src_reg in eBPF verifier itself, remove the leftovers from ppc64 JIT. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
mariux64 · Jan 27, 2018 · 53fbf57 · 53fbf57
1 parent a3212b8
commit 53fbf57
Showing 1 changed file with 0 additions and 8 deletions.
diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c
@@ -381,10 +381,6 @@ static int bpf_jit_build_body(struct bpf_prog *fp, u32 *image,
 			goto bpf_alu32_trunc;
 		case BPF_ALU | BPF_DIV | BPF_X: /* (u32) dst /= (u32) src */
 		case BPF_ALU | BPF_MOD | BPF_X: /* (u32) dst %= (u32) src */
-			PPC_CMPWI(src_reg, 0);
-			PPC_BCC_SHORT(COND_NE, (ctx->idx * 4) + 12);
-			PPC_LI(b2p[BPF_REG_0], 0);
-			PPC_JMP(exit_addr);
 			if (BPF_OP(code) == BPF_MOD) {
 				PPC_DIVWU(b2p[TMP_REG_1], dst_reg, src_reg);
 				PPC_MULW(b2p[TMP_REG_1], src_reg,
@@ -395,10 +391,6 @@ static int bpf_jit_build_body(struct bpf_prog *fp, u32 *image,
 			goto bpf_alu32_trunc;
 		case BPF_ALU64 | BPF_DIV | BPF_X: /* dst /= src */
 		case BPF_ALU64 | BPF_MOD | BPF_X: /* dst %= src */
-			PPC_CMPDI(src_reg, 0);
-			PPC_BCC_SHORT(COND_NE, (ctx->idx * 4) + 12);
-			PPC_LI(b2p[BPF_REG_0], 0);
-			PPC_JMP(exit_addr);
 			if (BPF_OP(code) == BPF_MOD) {
 				PPC_DIVD(b2p[TMP_REG_1], dst_reg, src_reg);
 				PPC_MULD(b2p[TMP_REG_1], src_reg,